JPWO2014002227A1 - 電池の製造方法及び電池 - Google Patents
電池の製造方法及び電池 Download PDFInfo
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Abstract
Description
次に、本発明の実施の形態のうちの実施例1について、図面を参照しつつ説明する。まず、本実施例1にかかる電池1について説明する。この電池1は、扁平捲回型の電極体10と、この電極体10をなす正極板20(後述)に抵抗溶接された正極端子構造体60と、電極体10を収容する電池ケース80とを備える密閉型のリチウムイオン二次電池である(図1,2参照)。この電池1は、これらのほかに、電極体10をなす負極板30(後述)に接合(抵抗溶接)された負極端子構造体70を備える。この電池1の正極端子構造体60は、電池ケース80の内圧上昇により電極体10への通電を遮断する通電遮断機構62(後述)を有している(図1,2参照)。
10 電極体
11 正極箔重層部(箔重層部)
12 正極箔溶着部(箔溶着部)
12C 箔溶着部(第1高位部と第1低位部とを形成した箔溶着部)
13 第1箔溶着表面(接合予定面)
13D 第1高位部
13E 第1低位部
14 第2箔溶着表面(電極側表面)
14D 第2高位部
14E 第2低位部
20 正極板
28 正極箔(アルミニウム箔)
28f 正極リード部(箔露出部)
60 正極端子構造体(正極端子部材)
62 通電遮断機構(圧力型通電遮断機構)
63YT 当接部
80 電池ケース
141 第1電極(抵抗溶接用電極)
DL 長径方向(拡がり方向)
DS1 短径方向外側(厚み方向一方側)
DS2 短径方向内側(厚み方向他方側)
DT 厚み方向
DX 軸線方向(拡がり方向)
M (ナゲットの厚み方向の)最大寸法
N ナゲット
P1 第1ピッチ
P2 第2ピッチ
T (箔重層部の)厚み寸法
Claims (9)
- アルミニウム箔を有する正極板を含み、上記正極板のうち、上記アルミニウム箔が露出した箔露出部が厚み方向に重なる箔重層部を有する電極体と、
アルミニウムからなり、上記箔重層部に抵抗溶接された正極端子部材と、を備え、
上記箔重層部と上記正極端子部材とは、上記アルミニウム箔の拡がり方向に、散点状に分布する複数のナゲットを介して結合してなる
電池の製造方法であって、
上記箔重層部において、
互いに重なるアルミニウム箔同士を超音波溶接により上記厚み方向に互いに溶着した箔溶着部であって、自身の表面のうち上記厚み方向一方側の接合予定面の少なくとも一部に、上記厚み方向一方側に高位の第1高位部と、上記第1高位部に比して低位で、上記第1高位部内に散点状に分布する複数の第1低位部と、を成形した箔溶着部を形成する形成工程と、
上記第1高位部を上記正極端子部材に当接させ、電流を流し、上記第1低位部に上記ナゲットを生成し、上記ナゲットを介して上記電極体の上記箔溶着部と上記正極端子部材とを抵抗溶接する抵抗溶接工程と、を備える
電池の製造方法。 - 請求項1に記載の電池の製造方法であって、
前記形成工程は、
前記箔溶着部の表面のうち、前記厚み方向他方側に位置し抵抗溶接用電極を当接させる電極側表面の少なくとも一部に、上記厚み方向他方側に高位の第2高位部と、上記第2高位部に比して低位で、上記第2高位部内に散点状に分布する複数の第2低位部と、を成形した上記箔溶着部を形成し、
前記抵抗溶接工程は、
上記抵抗溶接用電極で、上記第2高位部を上記厚み方向に押し潰しつつ行う
電池の製造方法。 - 請求項2に記載の電池の製造方法であって、
前記複数の第1低位部は、前記第1高位部内に格子状に配置され、
前記複数の第2低位部は、前記第2高位部内に格子状に配置されてなり、
上記第2低位部同士間の第2ピッチが、上記第1低位部同士間の第1ピッチよりも小さくされてなる
電池の製造方法。 - 請求項1〜請求項3のいずれか1項に記載の電池の製造方法であって、
前記電池は、
前記ナゲットの前記厚み方向の最大寸法をMとし、前記箔重層部の厚みをTとしたとき、
M/Tが0.20〜0.80の範囲である
電池の製造方法。 - 請求項1〜請求項4のいずれか1項に記載の電池の製造方法であって、
前記電池は、
電池ケース内に前記電極体を密閉してなる密閉型電池であり、
前記正極端子部材は、
上記電池ケースの内圧上昇により、上記電極体への通電を遮断する圧力型通電遮断機構を有する
電池の製造方法。 - アルミニウム箔を有する正極板を含み、上記正極板のうち、上記アルミニウム箔が露出した箔露出部が厚み方向に重なる箔重層部を有する電極体と、
アルミニウムからなり、上記箔重層部に抵抗溶接された正極端子部材と、を備え、
上記箔重層部と上記正極端子部材とは、上記アルミニウム箔の拡がり方向に、散点状に分布する複数のナゲットを介して結合してなる
電池。 - 請求項6に記載の電池であって、
前記箔重層部は、
前記アルミニウム箔同士を超音波溶接により前記厚み方向に互いに溶着した箔溶着部を有し、
上記箔溶着部の少なくとも一部が、前記正極端子部材に前記複数のナゲットを介して抵抗溶接されてなる
電池。 - 請求項6又は請求項7に記載の電池であって、
前記ナゲットの前記厚み方向の最大寸法をMとし、前記箔重層部の厚みをTとしたとき、
M/Tが0.20〜0.80の範囲である
電池。 - 請求項6〜請求項8のいずれか1項に記載の電池であって、
電池ケース内に前記電極体を密閉してなる密閉型電池であり、
前記正極端子部材は、
上記電池ケースの内圧上昇により、上記電極体への通電を遮断する圧力型通電遮断機構を有する
電池。
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JP6107346B2 (ja) * | 2013-04-09 | 2017-04-05 | トヨタ自動車株式会社 | 電池の製造方法及び電池 |
JP5995031B2 (ja) | 2013-06-05 | 2016-09-21 | トヨタ自動車株式会社 | 内燃機関の制御装置 |
JP6232213B2 (ja) * | 2013-06-06 | 2017-11-15 | 日立オートモティブシステムズ株式会社 | 二次電池及びその製造方法 |
KR102275421B1 (ko) * | 2014-11-19 | 2021-07-12 | 삼성에스디아이 주식회사 | 이차전지 제조 방법 및 이를 이용한 이차전지 |
FR3034259B1 (fr) | 2015-03-27 | 2021-08-27 | Accumulateurs Fixes | Procede de traitement mecanique d'une piece de connexion electrique pour generateur electrochimique |
JP6466296B2 (ja) * | 2015-09-10 | 2019-02-06 | 株式会社東芝 | 電池及び電池製造方法 |
WO2017057200A1 (ja) * | 2015-09-29 | 2017-04-06 | 株式会社Gsユアサ | 蓄電素子及び蓄電素子の製造方法 |
KR101949973B1 (ko) | 2016-04-15 | 2019-02-20 | 주식회사 엘지화학 | 전해액 함침장치 |
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